Impulse and continuous noise reduction of tactical hearing protection systems

2008 ◽  
Vol 123 (5) ◽  
pp. 3529-3529
Author(s):  
Richard McKinley ◽  
Brian Hobbs ◽  
Karl Buck ◽  
Dean Hudson
Keyword(s):  
Noise Reduction ◽  
Hearing Protection ◽  
Protection Systems ◽  
Continuous Noise

Hybrid feedforward-feedback active noise reduction for hearing protection and communication

2006 ◽  
Vol 120 (4) ◽  
pp. 2026-2036 ◽  
Author(s):  
Laura R. Ray ◽  
Jason A. Solbeck ◽  
Alexander D. Streeter ◽  
Robert D. Collier
Keyword(s):  
Noise Reduction ◽  
Hearing Protection ◽  
Active Noise ◽  
Active Noise Reduction

Skull simulator for design of hearing protection systems for bone‐conducted sound

2004 ◽  
Vol 116 (4) ◽  
pp. 2625-2626
Author(s):  
B. Scott May ◽  
Anthony J. Dietz ◽  
Odile Clavier ◽  
Steve Bilski
Keyword(s):  
Hearing Protection ◽  
Protection Systems

Real‐world performance of hearing protection systems in Army aviation

2004 ◽  
Vol 115 (5) ◽  
pp. 2378-2379 ◽  
Author(s):  
William A. Ahroon ◽  
Martin B. Robinette
Keyword(s):  
Real World ◽  
Hearing Protection ◽  
Protection Systems

scholarly journals The effect of hearing protection devices on speech intelligibility of Persian employees

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Mina Karami ◽  
Mohsen Aliabadi ◽  
Rostam Golmohammadi ◽  
Morteza Hamidi Nahrani
Keyword(s):  
Noise Reduction ◽  
Speech Intelligibility ◽  
Work Environments ◽  
Hearing Protection ◽  
Noise Attenuation ◽  
Speech Discrimination ◽  
Significant Difference ◽  
Protection Devices ◽  
Male Subjects ◽  
Speech Interference

Abstract Objective This study aimed to investigate the effect of hearing protection devices (HPDs) on speech intelligibility in Persian work environments. Three current earmuffs and three earplugs and one of the prototypes of molded earplug were tested on 15 male subjects which were randomly selected. The noise reduction of HPDs was measured based on the Real Ear Attenuation at Threshold (REAT) method. Speech intelligibility during using HPDs was determined based on the speech discrimination score (SDS) at two signal to noise (S/N) ratios (0 and + 5). Data were analyzed using SPSS 22. Results The actual to nominal noise reduction rating values were from 47 to 84% for HPDs. At two S/N ratios, no significant differences were observed in speech intelligibility using HPDs (p > 0.05). At S/N ratio = 0, the speech intelligibility descriptively has been only improved by using common earmuffs up to 9.07%. There was a significant difference up to 21.27% in speech intelligibility for proposed molded earplugs at S/N ratio = 0 (p < 0.05). Increasing the HPDs' noise attenuation values led to an increase in speech interference (p < 0.05). The HPDs with the minimum required noise attenuation while maintaining acceptable speech intelligibility should be worn by employees exposed to medium noise levels.

Developing a Methodology for Testing of Hearing Protection Systems

2021 ◽  
pp. 59-64
Author(s):  
S. de Oliveira ◽  
C. Mullins ◽  
J. Purutyan ◽  
L. Reiniger ◽  
B. Reymann ◽  
...  
Keyword(s):  
Hearing Protection ◽  
Protection Systems
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